515 lines
25 KiB
Markdown
515 lines
25 KiB
Markdown
# ACME (Let's Encrypt) Configuration
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See [Let's Encrypt examples](/user-guide/examples/#lets-encrypt-support) and [Docker & Let's Encrypt user guide](/user-guide/docker-and-lets-encrypt) as well.
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## Configuration
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```toml
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# Sample entrypoint configuration when using ACME.
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[entryPoints]
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[entryPoints.http]
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address = ":80"
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[entryPoints.https]
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address = ":443"
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[entryPoints.https.tls]
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```
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```toml
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# Enable ACME (Let's Encrypt): automatic SSL.
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[acme]
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# Email address used for registration.
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#
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# Required
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#
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email = "test@traefik.io"
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# File used for certificates storage.
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#
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# Optional (Deprecated)
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#
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#storageFile = "acme.json"
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# File or key used for certificates storage.
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#
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# Required
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#
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storage = "acme.json"
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# or `storage = "traefik/acme/account"` if using KV store.
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# Entrypoint to proxy acme apply certificates to.
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#
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# Required
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#
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entryPoint = "https"
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# Deprecated, replaced by [acme.dnsChallenge].
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#
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# Optional.
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#
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# dnsProvider = "digitalocean"
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# Deprecated, replaced by [acme.dnsChallenge.delayBeforeCheck].
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#
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# Optional
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# Default: 0
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#
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# delayDontCheckDNS = 0
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# If true, display debug log messages from the acme client library.
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#
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# Optional
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# Default: false
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#
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# acmeLogging = true
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# If true, override certificates in key-value store when using storeconfig.
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#
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# Optional
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# Default: false
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#
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# overrideCertificates = true
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# Deprecated. Enable on demand certificate generation.
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#
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# Optional
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# Default: false
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#
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# onDemand = true
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# Enable certificate generation on frontends host rules.
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#
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# Optional
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# Default: false
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#
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# onHostRule = true
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# CA server to use.
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# Uncomment the line to use Let's Encrypt's staging server,
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# leave commented to go to prod.
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#
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# Optional
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# Default: "https://acme-v02.api.letsencrypt.org/directory"
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#
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# caServer = "https://acme-staging-v02.api.letsencrypt.org/directory"
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# KeyType to use.
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#
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# Optional
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# Default: "RSA4096"
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#
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# Available values : "EC256", "EC384", "RSA2048", "RSA4096", "RSA8192"
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#
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# KeyType = "RSA4096"
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# Use a TLS-ALPN-01 ACME challenge.
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#
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# Optional (but recommended)
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#
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[acme.tlsChallenge]
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# Use a HTTP-01 ACME challenge.
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#
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# Optional
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#
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# [acme.httpChallenge]
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# EntryPoint to use for the HTTP-01 challenges.
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#
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# Required
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#
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# entryPoint = "http"
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# Use a DNS-01 ACME challenge rather than HTTP-01 challenge.
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# Note: mandatory for wildcard certificate generation.
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#
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# Optional
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#
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# [acme.dnsChallenge]
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# DNS provider used.
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#
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# Required
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#
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# provider = "digitalocean"
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# By default, the provider will verify the TXT DNS challenge record before letting ACME verify.
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# If delayBeforeCheck is greater than zero, this check is delayed for the configured duration in seconds.
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# Useful if internal networks block external DNS queries.
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#
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# Optional
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# Default: 0
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#
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# delayBeforeCheck = 0
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# Use following DNS servers to resolve the FQDN authority.
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#
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# Optional
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# Default: empty
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#
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# resolvers = ["1.1.1.1:53", "8.8.8.8:53"]
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# Disable the DNS propagation checks before notifying ACME that the DNS challenge is ready.
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#
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# NOT RECOMMENDED:
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# Increase the risk of reaching Let's Encrypt's rate limits.
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#
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# Optional
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# Default: false
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#
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# disablePropagationCheck = true
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# Domains list.
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# Only domains defined here can generate wildcard certificates.
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# The certificates for these domains are negotiated at traefik startup only.
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#
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# [[acme.domains]]
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# main = "local1.com"
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# sans = ["test1.local1.com", "test2.local1.com"]
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# [[acme.domains]]
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# main = "local2.com"
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# [[acme.domains]]
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# main = "*.local3.com"
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# sans = ["local3.com", "test1.test1.local3.com"]
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```
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### `caServer`
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The CA server to use.
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This example shows the usage of Let's Encrypt's staging server:
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```toml
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[acme]
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# ...
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caServer = "https://acme-staging-v02.api.letsencrypt.org/directory"
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# ...
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```
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### ACME Challenge
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#### `tlsChallenge`
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Use the `TLS-ALPN-01` challenge to generate and renew ACME certificates by provisioning a TLS certificate.
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```toml
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[acme]
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# ...
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entryPoint = "https"
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[acme.tlsChallenge]
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```
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!!! note
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If the `TLS-ALPN-01` challenge is used, `acme.entryPoint` has to be reachable by Let's Encrypt through port 443.
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This is a Let's Encrypt limitation as described on the [community forum](https://community.letsencrypt.org/t/support-for-ports-other-than-80-and-443/3419/72).
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#### `httpChallenge`
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Use the `HTTP-01` challenge to generate and renew ACME certificates by provisioning a HTTP resource under a well-known URI.
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Redirection is fully compatible with the `HTTP-01` challenge.
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```toml
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[acme]
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# ...
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entryPoint = "https"
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[acme.httpChallenge]
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entryPoint = "http"
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```
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!!! note
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If the `HTTP-01` challenge is used, `acme.httpChallenge.entryPoint` has to be defined and reachable by Let's Encrypt through port 80.
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This is a Let's Encrypt limitation as described on the [community forum](https://community.letsencrypt.org/t/support-for-ports-other-than-80-and-443/3419/72).
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##### `entryPoint`
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Specify the entryPoint to use during the challenges.
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```toml
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defaultEntryPoints = ["http", "https"]
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[entryPoints]
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[entryPoints.http]
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address = ":80"
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[entryPoints.https]
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address = ":443"
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[entryPoints.https.tls]
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# ...
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[acme]
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# ...
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entryPoint = "https"
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[acme.httpChallenge]
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entryPoint = "http"
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```
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!!! note
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`acme.httpChallenge.entryPoint` has to be reachable through port 80. It's a Let's Encrypt limitation as described on the [community forum](https://community.letsencrypt.org/t/support-for-ports-other-than-80-and-443/3419/72).
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#### `dnsChallenge`
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Use the `DNS-01` challenge to generate and renew ACME certificates by provisioning a DNS record.
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```toml
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[acme]
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# ...
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[acme.dnsChallenge]
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provider = "digitalocean"
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delayBeforeCheck = 0
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# ...
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```
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##### `delayBeforeCheck`
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By default, the `provider` will verify the TXT DNS challenge record before letting ACME verify.
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If `delayBeforeCheck` is greater than zero, this check is delayed for the configured duration in seconds.
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Useful if internal networks block external DNS queries.
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!!! note
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A `provider` is mandatory.
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##### `provider`
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Here is a list of supported `provider`s, that can automate the DNS verification, along with the required environment variables and their [wildcard & root domain support](/configuration/acme/#wildcard-domains) for each. Do not hesitate to complete it.
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| Provider Name | Provider Code | Environment Variables | Wildcard & Root Domain Support |
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|--------------------------------------------------------|----------------|-------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------|
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| [ACME DNS](https://github.com/joohoi/acme-dns) | `acme-dns` | `ACME_DNS_API_BASE`, `ACME_DNS_STORAGE_PATH` | Not tested yet |
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| [Alibaba Cloud](https://www.vultr.com) | `alidns` | `ALICLOUD_ACCESS_KEY`, `ALICLOUD_SECRET_KEY`, `ALICLOUD_REGION_ID` | Not tested yet |
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| [Auroradns](https://www.pcextreme.com/aurora/dns) | `auroradns` | `AURORA_USER_ID`, `AURORA_KEY`, `AURORA_ENDPOINT` | Not tested yet |
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| [Azure](https://azure.microsoft.com/services/dns/) | `azure` | `AZURE_CLIENT_ID`, `AZURE_CLIENT_SECRET`, `AZURE_SUBSCRIPTION_ID`, `AZURE_TENANT_ID`, `AZURE_RESOURCE_GROUP`, `[AZURE_METADATA_ENDPOINT]` | Not tested yet |
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| [Blue Cat](https://www.bluecatnetworks.com/) | `bluecat` | `BLUECAT_SERVER_URL`, `BLUECAT_USER_NAME`, `BLUECAT_PASSWORD`, `BLUECAT_CONFIG_NAME`, `BLUECAT_DNS_VIEW` | Not tested yet |
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| [Cloudflare](https://www.cloudflare.com) | `cloudflare` | `CF_API_EMAIL`, `CF_API_KEY` - The `Global API Key` needs to be used, not the `Origin CA Key` | YES |
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| [CloudXNS](https://www.cloudxns.net) | `cloudxns` | `CLOUDXNS_API_KEY`, `CLOUDXNS_SECRET_KEY` | Not tested yet |
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| [ConoHa](https://www.conoha.jp) | `conoha` | `CONOHA_TENANT_ID`, `CONOHA_API_USERNAME`, `CONOHA_API_PASSWORD` | YES |
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| [DigitalOcean](https://www.digitalocean.com) | `digitalocean` | `DO_AUTH_TOKEN` | YES |
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| [DNSimple](https://dnsimple.com) | `dnsimple` | `DNSIMPLE_OAUTH_TOKEN`, `DNSIMPLE_BASE_URL` | Not tested yet |
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| [DNS Made Easy](https://dnsmadeeasy.com) | `dnsmadeeasy` | `DNSMADEEASY_API_KEY`, `DNSMADEEASY_API_SECRET`, `DNSMADEEASY_SANDBOX` | Not tested yet |
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| [DNSPod](https://www.dnspod.com/) | `dnspod` | `DNSPOD_API_KEY` | Not tested yet |
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| [DreamHost](https://www.dreamhost.com/) | `dreamhost` | `DREAMHOST_API_KEY` | YES |
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| [Duck DNS](https://www.duckdns.org/) | `duckdns` | `DUCKDNS_TOKEN` | No |
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| [Dyn](https://dyn.com) | `dyn` | `DYN_CUSTOMER_NAME`, `DYN_USER_NAME`, `DYN_PASSWORD` | Not tested yet |
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| External Program | `exec` | `EXEC_PATH` | YES |
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| [Exoscale](https://www.exoscale.com) | `exoscale` | `EXOSCALE_API_KEY`, `EXOSCALE_API_SECRET`, `EXOSCALE_ENDPOINT` | YES |
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| [Fast DNS](https://www.akamai.com/) | `fastdns` | `AKAMAI_CLIENT_TOKEN`, `AKAMAI_CLIENT_SECRET`, `AKAMAI_ACCESS_TOKEN` | Not tested yet |
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| [Gandi](https://www.gandi.net) | `gandi` | `GANDI_API_KEY` | Not tested yet |
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| [Gandi v5](http://doc.livedns.gandi.net) | `gandiv5` | `GANDIV5_API_KEY` | YES |
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| [Glesys](https://glesys.com/) | `glesys` | `GLESYS_API_USER`, `GLESYS_API_KEY`, `GLESYS_DOMAIN` | Not tested yet |
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| [GoDaddy](https://godaddy.com/domains) | `godaddy` | `GODADDY_API_KEY`, `GODADDY_API_SECRET` | Not tested yet |
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| [Google Cloud DNS](https://cloud.google.com/dns/docs/) | `gcloud` | `GCE_PROJECT`, `GCE_SERVICE_ACCOUNT_FILE` | YES |
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| [hosting.de](https://www.hosting.de) | `hostingde` | `HOSTINGDE_API_KEY`, `HOSTINGDE_ZONE_NAME` | Not tested yet |
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| HTTP request | `httpreq` | `HTTPREQ_ENDPOINT`, `HTTPREQ_MODE`, `HTTPREQ_USERNAME`, `HTTPREQ_PASSWORD` (1) | YES |
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| [IIJ](https://www.iij.ad.jp/) | `iij` | `IIJ_API_ACCESS_KEY`, `IIJ_API_SECRET_KEY`, `IIJ_DO_SERVICE_CODE` | Not tested yet |
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| [INWX](https://www.inwx.de/en) | `inwx` | `INWX_USERNAME`, `INWX_PASSWORD` | YES |
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| [Lightsail](https://aws.amazon.com/lightsail/) | `lightsail` | `AWS_ACCESS_KEY_ID`, `AWS_SECRET_ACCESS_KEY`, `DNS_ZONE` | Not tested yet |
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| [Linode](https://www.linode.com) | `linode` | `LINODE_API_KEY` | Not tested yet |
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| [Linode v4](https://www.linode.com) | `linodev4` | `LINODE_TOKEN` | Not tested yet |
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| manual | - | none, but you need to run Traefik interactively, turn on `acmeLogging` to see instructions and press <kbd>Enter</kbd>. | YES |
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| [MyDNS.jp](https://www.mydns.jp/) | `mydnsjp` | `MYDNSJP_MASTER_ID`, `MYDNSJP_PASSWORD` | YES |
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| [Namecheap](https://www.namecheap.com) | `namecheap` | `NAMECHEAP_API_USER`, `NAMECHEAP_API_KEY` | YES |
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| [name.com](https://www.name.com/) | `namedotcom` | `NAMECOM_USERNAME`, `NAMECOM_API_TOKEN`, `NAMECOM_SERVER` | Not tested yet |
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| [Netcup](https://www.netcup.eu/) | `netcup` | `NETCUP_CUSTOMER_NUMBER`, `NETCUP_API_KEY`, `NETCUP_API_PASSWORD` | Not tested yet |
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| [NIFCloud](https://cloud.nifty.com/service/dns.htm) | `nifcloud` | `NIFCLOUD_ACCESS_KEY_ID`, `NIFCLOUD_SECRET_ACCESS_KEY` | Not tested yet |
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| [Ns1](https://ns1.com/) | `ns1` | `NS1_API_KEY` | Not tested yet |
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| [Open Telekom Cloud](https://cloud.telekom.de) | `otc` | `OTC_DOMAIN_NAME`, `OTC_USER_NAME`, `OTC_PASSWORD`, `OTC_PROJECT_NAME`, `OTC_IDENTITY_ENDPOINT` | Not tested yet |
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| [OVH](https://www.ovh.com) | `ovh` | `OVH_ENDPOINT`, `OVH_APPLICATION_KEY`, `OVH_APPLICATION_SECRET`, `OVH_CONSUMER_KEY` | YES |
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| [PowerDNS](https://www.powerdns.com) | `pdns` | `PDNS_API_KEY`, `PDNS_API_URL` | Not tested yet |
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| [Rackspace](https://www.rackspace.com/cloud/dns) | `rackspace` | `RACKSPACE_USER`, `RACKSPACE_API_KEY` | Not tested yet |
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| [RFC2136](https://tools.ietf.org/html/rfc2136) | `rfc2136` | `RFC2136_TSIG_KEY`, `RFC2136_TSIG_SECRET`, `RFC2136_TSIG_ALGORITHM`, `RFC2136_NAMESERVER` | Not tested yet |
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| [Route 53](https://aws.amazon.com/route53/) | `route53` | `AWS_ACCESS_KEY_ID`, `AWS_SECRET_ACCESS_KEY`, `[AWS_REGION]`, `[AWS_HOSTED_ZONE_ID]` or a configured user/instance IAM profile. | YES |
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| [Sakura Cloud](https://cloud.sakura.ad.jp/) | `sakuracloud` | `SAKURACLOUD_ACCESS_TOKEN`, `SAKURACLOUD_ACCESS_TOKEN_SECRET` | Not tested yet |
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| [Selectel](https://selectel.ru/en/) | `selectel` | `SELECTEL_API_TOKEN` | YES |
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| [Stackpath](https://www.stackpath.com/) | `stackpath` | `STACKPATH_CLIENT_ID`, `STACKPATH_CLIENT_SECRET`, `STACKPATH_STACK_ID` | Not tested yet |
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| [TransIP](https://www.transip.nl/) | `transip` | `TRANSIP_ACCOUNT_NAME`, `TRANSIP_PRIVATE_KEY_PATH` | YES |
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| [VegaDNS](https://github.com/shupp/VegaDNS-API) | `vegadns` | `SECRET_VEGADNS_KEY`, `SECRET_VEGADNS_SECRET`, `VEGADNS_URL` | Not tested yet |
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| [Vscale](https://vscale.io/) | `vscale` | `VSCALE_API_TOKEN` | YES |
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| [VULTR](https://www.vultr.com) | `vultr` | `VULTR_API_KEY` | Not tested yet |
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- (1): more information about the HTTP message format can be found [here](https://github.com/xenolf/lego/blob/master/providers/dns/httpreq/readme.md)
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#### `resolvers`
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Use custom DNS servers to resolve the FQDN authority.
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```toml
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[acme]
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# ...
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[acme.dnsChallenge]
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# ...
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resolvers = ["1.1.1.1:53", "8.8.8.8:53"]
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```
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### `domains`
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You can provide SANs (alternative domains) to each main domain.
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All domains must have A/AAAA records pointing to Traefik.
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Each domain & SAN will lead to a certificate request.
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!!! note
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The certificates for the domains listed in `acme.domains` are negotiated at traefik startup only.
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```toml
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[acme]
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# ...
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[[acme.domains]]
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main = "local1.com"
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sans = ["test1.local1.com", "test2.local1.com"]
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[[acme.domains]]
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main = "local2.com"
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[[acme.domains]]
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main = "*.local3.com"
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sans = ["local3.com", "test1.test1.local3.com"]
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# ...
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```
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!!! warning
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Take note that Let's Encrypt applies [rate limiting](https://letsencrypt.org/docs/rate-limits).
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!!! note
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Wildcard certificates can only be verified through a `DNS-01` challenge.
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#### Wildcard Domains
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[ACME V2](https://community.letsencrypt.org/t/acme-v2-and-wildcard-certificate-support-is-live/55579) allows wildcard certificate support.
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As described in [Let's Encrypt's post](https://community.letsencrypt.org/t/staging-endpoint-for-acme-v2/49605) wildcard certificates can only be generated through a [`DNS-01` challenge](/configuration/acme/#dnschallenge).
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```toml
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[acme]
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# ...
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[[acme.domains]]
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main = "*.local1.com"
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sans = ["local1.com"]
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# ...
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```
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It is not possible to request a double wildcard certificate for a domain (for example `*.*.local.com`).
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Due to ACME limitation it is not possible to define wildcards in SANs (alternative domains). Thus, the wildcard domain has to be defined as a main domain.
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Most likely the root domain should receive a certificate too, so it needs to be specified as SAN and 2 `DNS-01` challenges are executed.
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In this case the generated DNS TXT record for both domains is the same.
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Even though this behavior is [DNS RFC](https://community.letsencrypt.org/t/wildcard-issuance-two-txt-records-for-the-same-name/54528/2) compliant, it can lead to problems as all DNS providers keep DNS records cached for a certain time (TTL) and this TTL can be superior to the challenge timeout making the `DNS-01` challenge fail.
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The Traefik ACME client library [LEGO](https://github.com/xenolf/lego) supports some but not all DNS providers to work around this issue.
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The [`provider` table](/configuration/acme/#provider) indicates if they allow generating certificates for a wildcard domain and its root domain.
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### `onDemand` (Deprecated)
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!!! danger "DEPRECATED"
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This option is deprecated.
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```toml
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[acme]
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# ...
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onDemand = true
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# ...
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```
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|
|
|
Enable on demand certificate generation.
|
|
|
|
This will request certificates from Let's Encrypt during the first TLS handshake for host names that do not yet have certificates.
|
|
|
|
!!! warning
|
|
TLS handshakes are slow when requesting a host name certificate for the first time. This can lead to DoS attacks!
|
|
|
|
!!! warning
|
|
Take note that Let's Encrypt applies [rate limiting](https://letsencrypt.org/docs/rate-limits).
|
|
|
|
### `onHostRule`
|
|
|
|
```toml
|
|
[acme]
|
|
# ...
|
|
onHostRule = true
|
|
# ...
|
|
```
|
|
|
|
Enable certificate generation on frontend `Host` rules (for frontends wired to the `acme.entryPoint`).
|
|
|
|
This will request a certificate from Let's Encrypt for each frontend with a Host rule.
|
|
|
|
For example, the rule `Host:test1.traefik.io,test2.traefik.io` will request a certificate with main domain `test1.traefik.io` and SAN `test2.traefik.io`.
|
|
|
|
!!! warning
|
|
`onHostRule` option can not be used to generate wildcard certificates.
|
|
Refer to [wildcard generation](/configuration/acme/#wildcard-domains) for further information.
|
|
|
|
### `storage`
|
|
|
|
The `storage` option sets the location where your ACME certificates are saved to.
|
|
|
|
```toml
|
|
[acme]
|
|
# ...
|
|
storage = "acme.json"
|
|
# ...
|
|
```
|
|
|
|
The value can refer to two kinds of storage:
|
|
|
|
- a JSON file
|
|
- a KV store entry
|
|
|
|
!!! danger "DEPRECATED"
|
|
`storage` replaces `storageFile` which is deprecated.
|
|
|
|
!!! note
|
|
During migration to a KV store use both `storageFile` and `storage` to migrate ACME certificates too. See [`storeconfig` subcommand](/user-guide/kv-config/#store-configuration-in-key-value-store) for further information.
|
|
|
|
#### As a File
|
|
|
|
ACME certificates can be stored in a JSON file that needs to have file mode `600`.
|
|
|
|
In Docker you can either mount the JSON file or the folder containing it:
|
|
|
|
```bash
|
|
docker run -v "/my/host/acme.json:acme.json" traefik
|
|
```
|
|
```bash
|
|
docker run -v "/my/host/acme:/etc/traefik/acme" traefik
|
|
```
|
|
|
|
!!! warning
|
|
This file cannot be shared across multiple instances of Traefik at the same time. Please use a [KV Store entry](/configuration/acme/#as-a-key-value-store-entry) instead.
|
|
|
|
#### As a Key Value Store Entry
|
|
|
|
ACME certificates can be stored in a KV Store entry. This kind of storage is **mandatory in cluster mode**.
|
|
|
|
```toml
|
|
storage = "traefik/acme/account"
|
|
```
|
|
|
|
Because KV stores (like Consul) have limited entry size the certificates list is compressed before it is saved as KV store entry.
|
|
|
|
!!! note
|
|
It is possible to store up to approximately 100 ACME certificates in Consul.
|
|
|
|
#### ACME v2 Migration
|
|
|
|
During migration from ACME v1 to ACME v2, using a storage file, a backup of the original file is created in the same place as the latter (with a `.bak` extension).
|
|
|
|
For example: if `acme.storage`'s value is `/etc/traefik/acme/acme.json`, the backup file will be `/etc/traefik/acme/acme.json.bak`.
|
|
|
|
!!! note
|
|
When Traefik is launched in a container, the storage file's parent directory needs to be mounted to be able to access the backup file on the host.
|
|
Otherwise the backup file will be deleted when the container is stopped. Traefik will only generate it once!
|
|
|
|
### `dnsProvider` (Deprecated)
|
|
|
|
!!! danger "DEPRECATED"
|
|
This option is deprecated. Please use [dnsChallenge.provider](/configuration/acme/#provider) instead.
|
|
|
|
### `delayDontCheckDNS` (Deprecated)
|
|
|
|
!!! danger "DEPRECATED"
|
|
This option is deprecated. Please use [dnsChallenge.delayBeforeCheck](/configuration/acme/#dnschallenge) instead.
|
|
|
|
## Fallbacks
|
|
|
|
If Let's Encrypt is not reachable, these certificates will be used:
|
|
|
|
1. ACME certificates already generated before downtime
|
|
1. Expired ACME certificates
|
|
1. Provided certificates
|
|
|
|
!!! note
|
|
For new (sub)domains which need Let's Encrypt authentification, the default Traefik certificate will be used until Traefik is restarted.
|